ã€Introduction】 Xianglong Blood Tree, also known as Brazilian Iron Tree, is an agave plant of the genus Corydalis. Xianglong Blood Tree has thick trunks, sword-shaped leaves, and green oils. It is full of vitality. Nowadays known as the "Rising Star of the Leaf Plant," it has become a very popular indoor foliage plant in the world.
Xianglong blood trees have been introduced to Europe from tropical Africa in the 1740s, and are cultivated in greenhouses in British and French botanical gardens for visitors to enjoy. Later entered the botanical gardens and parks in the Americas and Asia. To the 1970s potted dragon blood trees have been very popular in Europe and the United States, becoming one of the indoor important decorative plants. At present, the annual output value of the Dutch Dragon Blood Tree has reached 37.6 million U.S. dollars, ranking second in the Dutch pot plant output value. Italy. Spain and other countries also have a certain scale of production. In Japan, the annual output value of Xianglong Xueshu is 38 million US dollars and 4.5 million pots are produced, which is the fifth largest output of potted plants in Japan. Nowadays, there is no small production in tropical India. The United States has an important position in the production value of 521 million US dollars worth of foliage plants. So far, the U.S.-based Hemet International and the Igyi Trading Company are the main production companies of American Dragon Blood Trees and are well-known internationally. In addition, the Dutch company, Kasahinzaden, Menfan Company and Israel's Yag Nursery occupy an important position in the production of Xianglong Xueshu. They have all been industrialized and the products are sold all over the world.
The cultivation of Chinese dragon tree was started from the introduction of Xishuangbanna Tropical Botanical Garden in Yunnan in the late 1950s, and it was mainly landscaped. As a potted ornamental plant, it gradually became popular from the early 1980s. So far, Guangdong, Fujian and other provinces in the dragon blood tree breeding production scale has been formed, basically has to meet the needs of the domestic market. The current goal is how to improve quality, reduce costs, and open up the international market.
Morphological characteristics and varieties Xianglong blood trees are erect single stem shrubs. Leaves clustered on stem top, long and wide linear, sessile, margin leafy, dark green. Common species are yellow edge of the dragon tree (Linderii), yellowish leaves. Massangaeana, with yellow longitudinal stripes in the center of the leaf. Phnom Penh, a dragon tree (Victoriae), with dark yellow leaves with white edges. The species belonging to the same genus is D.concinnacv. Tricolor, which has green leaves with yellow-white and red vertical stripes. D.concinnacv.Rainbow, with a yellowish midvein vein, deep reddish edges, and light brown between midrib and limbus. D. deremensis, a cultivar of Bausei, with dark green leaves and a broad, central, milky white band; Janet Craig, golden leaves; Roehrsii The leaves are green and white with a golden stripe; the golden Roehrs Gold is a yellow-leafed, central gray-green; the silver-lined dragon tree (Warneckei) is long sword-shaped, with a twisted apex, a thick green edge, and a midrib Light green with white markings. D.godseffiana, dark green leaves with yellow and milky spots. Its cultivar, Florida Beauty, has dense yellow-flake spots on its foliage; Friedman, dark green leaves, white patches in the center, and dense milky-white spots on the edges. Queen D.goldieana, leaves oval, with horizontal pale green and grayish white bands. Celes, a cultivar of D. sanderiana, is 1-2 cm wide, dark green, with white margins, Margaret Berkery on the silver margin, white band on the leaf margins, and Phnom Penh Virescens) with yellow bands on leaf margins; Boringuesis, dark green leaves with yellow-green streaks.
[Biological characteristics] Dragon blood tree native to western Africa Canary Islands. High temperature and humidity and sunny environment. The growth temperature of Xianglong blood trees is 18-24°C, 24-24°C from March to September, and 13-18°C from September to March. Winter temperatures fall below 13°C into dormancy, and plants below 5°C suffer freezing injury. Among them, Boring Bamboo can withstand 2°C low temperature. Fragrant Dracaena's Wet, afraid of cockroaches. The leaf grows vigorously, keep the basin soil moist, the air humidity is in 70% ～ 80%, and spray water to the leaf surface frequently, but the basin soil cannot collect water. Do not control the watering during the winter dormancy period, otherwise it is prone to the phenomenon of coking at the tip. Xianglong blood trees have strong adaptability to sunlight. Under sunny or semi-negative conditions, stems and leaves can grow and develop normally. However, long-term low-light conditions of the leaf types make the color lighter or disappear. The soil is suitable for fertile, loose and well-drained sandy loam. Potted plants are best blended with rot leaf soil, culture soil and coarse sand.
[propagation method] Common cutting propagation. From May to June, mature and robust stems are selected and cut into 5 to 10 centimeter sections, laid flat on a sand bed, and maintained at 25 to 30°C room temperature and 80% air humidity. Roots can be taken in about 30 to 40 days, and 50 days can be directly Potted plants. It is also possible to cut stalk shoots with 3 to 4 leaves and cut them for cuttings, insert them into the sand bed, maintain high temperature and humidity, and take root after 30 days. It is also possible to use water and high pressure methods but it must be done at temperatures above 25°C.
[Cultivation and Management] Potted Fragrant Dracaena commonly used 12 to 20 cm pots, 3 stems with 25 cm pots. During the growing season, fertilize once every half-month, or use "high-potassium nitrate fertilizer" in the "Mengyou" 20-8-20 seasons. If the indoor temperature in winter is lower than 13°C, stop fertilizing. If nitrogen fertilizer is applied too much, the golden markings of the leaves are not obvious, which may affect the ornamental effect. Xianglong blood trees are resistant to pruning and can be used to control plant height and shape. In order to make the leaf buds grow vigorously, we must change the basin every spring. The new strain should be changed once a year, and the old strain should be changed once every two years. The leaves of the lower part of the leaf shrubs withered and withered are usually cut off.
[Pest and pest control] Common leaf spot and anthracnose hazards, can be used 70% thiophanate-methyl WP 1000 times spray. Insect pests are harmed by scale insects and aphids and can be sprayed with 40% omethoate EC 1000 times.
ã€Post-harvest treatment】 Xianglong blood tree plant is tall and straight, elegant and full of tropical flavor. Several stem plants of different heights were planted into large-scale potted plants and used it to arrange the venue. The living room and lobby are elegant and full of natural appeal. Small potted plants or water-growing plants decorate the window sill, study and bedroom of the living room, making it even more elegant and elegant. Xianglong blood trees in the storage process with the temperature of 16 ~ 18 °C best, relative humidity of 80% to 90%, can withstand 15 days in the dark environment. However, if the temperature is lower than 8°C during storage and transportation, the plants are susceptible to freezing damage. If the air humidity is too low, it will cause severe necrosis of the leaf margin tissues.
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